G&G Armament GTP 9 Black/Grey
 is a popular gas blowback (GBB) airsoft pistol known for its performance and modern design. It features a unique adjustable hop-up system and a revolutionary whirl cylinder valve for reliability. 
 
Key Features
Realistic Blowback Action: The GBB system provides realistic recoil and operation, simulating the feel of a real firearm.
Unique Hop-Up Adjustment: It includes a unique hop-up adjustment key that slots down the barrel, eliminating the need to remove the slide for adjustments.
Innovative Internals: Features a revolutionary whirl cylinder valve designed to prevent frost build-up and improve gas efficiency and reliability.
Ambidextrous Controls: The pistol is designed to be friendly for both left and right-handed users, featuring an ambidextrous magazine release and slide lever catch.
Integrated Accessory Rail: A 20mm lower accessory rail allows for the attachment of tactical flashlights or lasers.
Durable Construction: The pistol has a full metal slide and a textured, ergonomic polymer frame, providing a balance of durability and a realistic weight.
Included Accessories: Each package typically comes with a carrying case and a speedloader. 
Specifications
Specification 
Details
Power Source
Green Gas/Propane
Material
Polymer frame / Metal slide and outer barrel
Muzzle Velocity
Approximately 300-350 FPS (with 0.20g BBs)
Magazine Capacity
22-27 rounds
Overall Length
215mm - 225mm
Weight
~750g - 770g (with magazine)
Inner Barrel Length
102mm
Thread
12mm CCW (Counter-Clockwise)